A preliminary study showed that a 33-year-old man living in Hong Kong had Covid-19 twice this year.
The University of Hong Kong team reported on Monday that he had symptoms. The first time but had no obvious symptoms the second time. This preprint study found that the man’s second Covid-19 case occurred 142 days after the first case. This study showed that in his first attack, the patient had a cough, sore throat, fever, and headache for three days.

The researchers said that in his second episode:
The patient returned to Hong Kong from the UK via Spain. He tested positive at the Hong Kong airport on August 15.
In this study:
Researchers from universities and various hospitals in Hong Kong analyzed the symptoms that emerged from the patients. These symptoms appeared 10 days after the symptoms appeared in the first episode. And then on the second day of hospitalization.
Genetic analysis showed that the first infection was from the corona virus strain most related to the US or UK strains, and the second infection was most related to the Swiss and UK strains.
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The researchers wrote that the findings also indicate that people who have been vaccinated with the coronavirus should get the vaccine when and when it is available.
Maria Van Kerkhove, head of the World Health Organization’s coronavirus response technology and head of the Emerging Diseases and Zoonoses Department.
Said at a press conference in Geneva on Monday: “I think what’s really important is, We have to bring this into the background.”
“Even if this is the 1st recorded case of re-infection. It is certainly possible, because based on our experience with other human coronaviruses.”
The possible re infection of Covid-19 surprised Dr. Paul Hunter, a professor of medicine at the University of East Anglia’s Norwich School of Medicine in the UK, who was not involved in this new study.
Hunter said in a written statement:
“The reports of men who are reinfected with COVID-19 in Hong Kong are not genetically different from the first infection. This is not surprising”.